/*
 * Copyright (c) 2013, SRI International
 * All rights reserved.
 * Licensed under the The BSD 3-Clause License;
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 * 
 * http://opensource.org/licenses/BSD-3-Clause
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the aic-web-praise nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.sri.ai.lpitools.latex.interfaces.implementations;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.Vector;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.apache.xmlrpc.XmlRpcException;
import org.apache.xmlrpc.client.XmlRpcClient;
import org.apache.xmlrpc.client.XmlRpcClientConfigImpl;

import com.sri.ai.lpitools.cobra.gwtutil.dataobjects.shared.LWPException;
import com.sri.ai.lpitools.latex.interfaces.api.LatexInterface;

/**
 * @author pwolf
 *
 */
public class RPCLatexInterfaceImpl implements LatexInterface {

	private final Logger logger = Logger.getLogger(getClass().getSimpleName());
	
	private XmlRpcClient client;
	private String url;
	
	/* (non-Javadoc)
	 * @see com.sri.ai.lpitools.latex.interfaces.api.LatexInterface#getTexLiveURL(java.lang.String, java.lang.String)
	 */
	@Override
	public String getTexLiveImage(String queryResult) throws LWPException {
		Object resultCall = null;
		String result;
		Vector<String> paramModel = new Vector<String>();
		paramModel.add(queryResult);

		try {
			//call setup remote service 
			resultCall = client.execute("LatexServer.getTexLiveImage", paramModel);

		} catch (XmlRpcException e) {
			logger.log(Level.WARNING, "unable to  getTexLiveImage " + e.getMessage());
			throw new LWPException("Error with TEXLive image creating, "+ e.getMessage());
		}	
		
		//if we get something back check what the result was
		//if we get result then check what it is
		if(resultCall != null){
			result = (String) resultCall;
		}
		else{
			throw new LWPException("Error with TEXLive image creating, got a null string back");
		}
		return result;
	}

	/* (non-Javadoc)
	 * @see com.sri.ai.lpitools.latex.interfaces.api.LatexInterface#setUp(java.lang.String)
	 */
	@Override
	public void setUp(String url)  {
		logger.info("In RPCLatexInterfaceImpl setup");
		this.url  = "http://" + url;
		try {
			setUpClient(this.url);
		} catch (MalformedURLException e) {
			logger.info("Error: the URL for the server is malformed: " + this.url );
		}	

	}
    /**
     * Function to set up a client with given server url
     * @param serverURL
     * @throws MalformedURLException
     */
	private void setUpClient(String url) throws MalformedURLException{
	    //set up client with given url
		XmlRpcClientConfigImpl config = new XmlRpcClientConfigImpl();
		config.setServerURL(new URL(url));
		client = new XmlRpcClient();
		client.setConfig(config);		
	}
	
}
